HiTorque 3990 Mini Mill

Most powerful mini mill machine in its class
Most low-speed torque in its class
No gears in spindle drive
Largest table and X-Y travel in its class
R8 spindle and drill chuck

Part Number: 3990
Weight: 177 lb

Price: $1,299.00

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The LittleMachineShop.com HiTorque Mini Mill is the best in its class. It has the most power, the most torque, and a larger table than other mills in its class.

This mill has a solid column. It does not tilt from side to side. This construction is significantly stiffer than the tilting column on other mini mills. This model also includes the air spring head support for even support through the Z-axis range of travel.

The 500 Watt brushless spindle drive motor provides tremendous low-end torque. And you can vary the speed from 100 rpm to 2500 RPM continuously. There are no gears to shift. And, with no gears, the HiTorque Mini Mill machine is the quietest in its class.

The large mill table provides 50% more table area than other mini mills. It also has 30% more travel in each direction. The resettable feed dials allow you to zero them at any point.

The HiTorque Mini Mill has drill press handles for drilling and fast motion of the mill's head. It also has Z-axis fine feed with 0.001" resolution for milling operations.

This machine is shipped completely assembled and adjusted. Machined surfaces are coated with a viscous oil to prevent rust. It wipes off easily with a rag; no solvents necessary.

*NOTE* We ship machines only to the US and Canada.

Chris' Tips

Chris' Tips
You can compare the specifications for our mills.

See what the difference is between the SIEG drive system and the HiTorque drive system.

The solid column is much more rigid than the tilting column.

Some people may feel that the tilting column is a feature, but I have used a mini mill for many years and never tilted the column on purpose.

Let's compare the LittleMachineShop.com Solid Column HiTorque Mini Mill to mini mills with a tilting column.

The tilting column on other folk's mini mills tilts 45 degrees from side to side. This has several advantages. First, it is possible to make some angled cuts. It's also easy to tram in the X-axis. One user (and only one) has described to me a cut that was impossible to make any way but using a tilting column.

This mill has a solid column. While it is harder to tram in the X-axis because you must use shims, it is not as easy to knock it out of tram as the tilting column mini mill. The solid column has thicker walls than the tilting column, and a stiffer joint where it joins the base, so the column is significantly more rigid than the tilting column.

LittleMachineShop.com no longer sells mills with a tilting column. That is an indication of how much better the solid column is.

Here's what you need to convert the HiTorque Mini Mill to CNC. (But be sure you look at the CNC milling machines that we sell before you start).

Here are the user's guides for our machines.

Features

500 Watt output spindle motor
Large X-Y table
R8 Spindle for wide tool availability
Solid column that does not tilt
NSK brand Japanese bearings
Gas strut provides even support through the Z-axis range
Dovetail column maintains head alignment at any height
Fine feed on Z-axis for precise control
Three radial handles for drilling
E-stop safety power switch
Adjustable Z-axis stop for repetitive drilling
Neoprene bellows protect horizontal ways
Adjustable gibs on all dovetail ways
Includes R8 to 33JT drill chuck arbor and 1/2" drill chuck

Specifications

Specifications
End Milling Capacity	0.6" (16 mm)
Face Milling Capacity	1.2" (30 mm)
Drilling Capacity	0.5" (13 mm)
Table Size	18.1" x 4.7" (460 mm x 120 mm)
T-Slots	3 slots 0.47" (12.0 mm) wide
X-Axis Travel	11.8" (300 mm)
Y-Axis Travel	5.1" (130 mm)
Z-Axis Travel	10.6" (270 mm)
Throat	6.5" (165 mm)
X- and Y-Axis Feed Screws	0.062" (1.59 mm) per rotation
Maximum Spindle to Table	11.5" (292 mm)
Positioning Accuracy	0.0004" (0.010 mm)
Spindle Taper	R8
Spindle Motor	0.67 hp (500 Watts)
Spindle Speed	100 - 2500 RPM
Power Requirements	120 V 60 Hz 8 Amps
Machine Weight	124 lbs (56 kg)
Base Dimensions (W x D)	8.5" x 14.2" (216 mm x 362 mm)
Mounting Holes Center to Center (W x D)	7.09" x 11.81" (180.0 mm x 300.0 mm)
Overall Dimensions (W x D x H)	23.2" x 19.7" x 36.3" (590 mm x 500 mm x 922 mm)
Crated Weight	161 lbs (73 kg)
Crate Dimensions (W x D x H)	23.6" x 25.0" x 29.9" (600 mm x 635 mm x 760 mm)

Photos

	3990 HiTorque Mini Mill
	Front View
	Side View
	Control Box
	Solid Column Rigid Base
	Back View Solid Column Rigid Base
	The solid column on the left, tilting column on the right. The solid column has significantly thicker walls

Contents

The HiTorque Mini Mill comes with the following:

Mini Mill Users Guide written by Chris Wood
2 T-slot nuts with 3/8"-16 thread
Three open end wrenches (8/10 mm, 14/17 mm, 17/19 mm)
Four hex (Allen) wrenches (3, 4, 5, and 6 mm)
One 45-52 mm spanner wrench
Spindle lock pin
Oil can (plastic)
One 1/2" drill chuck and R8/JT33 arbor

Compatibility

Compatibility

This product works with these LittleMachineShop.com products:

1676 Arbor, Drill Chuck R8 to 33JT
5510 Chip Tray, HiTorque Mini Mill
1212 Drill Chuck, 1/2"
1660 Drill Chuck, 1/2" Keyless
3153 Drill Chuck, 1/2" Professional Grade
5629 Stand Cabinet, HiTorque Mini Mill
3818 Tachometer, Spindle, HiTorque Mills & Lathes
3489 Tooling Package, R8 Mini Mill

Shipping

These machines ship by freight truck because they are simply too heavy and bulky for UPS Parcel Service. If your location will be difficult for larger truck/Semi-trailer, please let us know.

We normally ship truck orders a day or two after we receive the order. For local orders transportation usually takes no more than a day or two. For orders going across county or over water the transportation time can be up to a week or longer.

We add the following shipping cost to your order total:

We ship machines only to the US and Canada.

Destination	*Local	Continental US
Freight Terminal (pick-up) Within 50 miles / 1 hour of travel Note: Not all terminals allow pickup	$99	$179
Commercial Address (inc. Limited Access Sites) Set hours / No delivery appointment Includes limited access (e.g. Schools, Military, Gov. Bldgs) DOES NOT include liftgage service**	$99	$199
**Liftgate: Add liftgate if forklift or loading dock is not available onsite.		+ $50
Residential Address Includes delivery appointment and liftgage for ALL Residential businesses or limited access facilities (e.g. schools) requiring appointment or liftgage	$99	$249

*Local refers to the parts of Southern California served by Hollywood Delivery Service.

**Liftgate service is included in local delivery and residential delivery. A loading dock or forklift is assumed in commercial deliveries. If these are not available, please add this extra service.

Additional Notes

Contact and delivery. Ensure you choose the correct type of delivery, have a dedicated contact person/number, and are ready on day of delivery. Freight companies charge an additional fee if delivery exceeds 30 minutes.
Only one shipping charge for entire pallet (up to 700 pounds total). The shipping charges shown above cover the cost of shipping the machine and anything else that you purchase with it, including a second machine, stand, tooling, and accessories.
A "commercial address" has a sign with company name, a public entrance and posted hours of operation. If you are running a business at your residence without a public entrance and posted company name and hours of operation it is considered a residence and a not commercial address.
A "limited access" designation is required for "Secured Locations" (schools, colleges, universities, university hospitals, military bases, government facilities, etc). Please provide accurate details on delivery in special instructions.
"Terminal Pickup" allows for pickup at local terminal. If there is not a terminal within 50 miles (or 1 hour), we will confirm with you that you still want Terminal Pickup. Terminals tend to be near highways (usually miltiple intersecting) and industrial centers. Only certain terminals allow pick-up.
"Residential delivery" does not include moving machine into home/garage/workshop or any setup. Delivery is to start of driveway on the street that the delivery truck can access. (See inside delivery below.)

For delivery to Alaska, Hawaii, or Puerto Rico

We will check with several trucking companies to get the best price and then call for your approval before we ship.

Canadian Shipments

Truck Freight shipping to Canada involves 3 distinct charges in addition to the product costs. (All amounts are in US Dollars, see the current mid-market exchange rate.)

Canadian Provincial Taxes (GST, PST, HST) depending on which province the shipment is going to. This will be 5% - 15% added to total sales amount depending on province (Canadian Sales Tax).
Hemisphere Customs Brokerage which handles all customs clearance requirements. This is a flat fee of $108 on any shipment.
Truck Freight from Southern California to destination in Canada. This is generally $300-$500 for residential liftgate delivery and appointment for single machine + tooling orders. Delivery to a terminal for pick-up or a commercial location with loading capabilities can reduce this cost substantially.

Quotes

To get a quotation that includes the shipping costs, add the products you want to the shopping cart and continue the checkout process until you reach the Payment page. On the Payment page, select the Quotation option. We will add the shipping costs and return a complete quotation to you within one business day.

Inside Delivery

For many years we have offered INSIDE DELIVERY for an added charge (as set by freight carriers). Unfortunately, most carriers have stopped this practice for liability, cost, or other reasons and we can no longer reliably offer it. If you really need Inside Delivery, please give us a call and we can try to help with your specific situation. Our recommendation however has always been to call some friends or find someone local. Saves some money and lets you meet the neighbors....

Alternatively, companies like Navis Pack & Ship (www.gonavis.com) or similar may be able to help you pack up a machine, or move it into your home/shop.